His name was Arthur Anderson, spelled with an “o.” He was NOT the famed Arthur Andersen, spelled with an “e,” who founded an eponymous accounting firm.

THIS Arthur Anderson wasn’t famous, you’ve probably never heard of him, and you certainly wouldn’t have recognized him.  But you were familiar with his voice, sort of.

He began his career while still a boy, as radio talent on Orson Welles’ Mercury Theater. This led to an acting gig playing the herald Lucius, alongside Welles as Brutus, in the 1937 on-air version of Julius Caesar. He even sang and played a ukulele made to look like a lute. It was clear he had talent, but he was also still very young, which got him into trouble after he tested the theater’s fire system with matches and succeeded in causing a deluge onstage.

This ended his relationship with Orson Welles, but he remained in the entertainment business for the rest of his life. He lent his voice to numerous radio programs like “Uncle Nick Kenny’s Radio Kindergarten” and “Let’s Pretend,” and had small roles in movies and shows like “Car 54, Where Are You?” “Midnight Cowboy,” “Zelig,” and “Law and Order.”

But his moment of greatness came in 1963, when ad agency Dancer-Fitzgerald-Sample asked him to audition for the voice of a leprechaun in an animated commercial for a new kids’ cereal. Though Anderson wasn’t Irish, he drew on his years of voice training to declare, in a now-famous brogue, how delicious plain oats could be with the addition of marshmallows shaped like pink hearts, yellow moons, orange stars and green clovers. He got the part, and for the next 30 years, Arthur Anderson was the unseen but iconic voice of Lucky the Leprechaun on every TV ad for Frosted Lucky Charms.

It was a great gig, one that kept him busy and paid him lots of money over the years. But he felt that was all secondary to the real benefit that the job gave him: at the original audition, he met and fell in love with the agency casting director Alice Middleton, they got married and stayed together for over 50 years, until her passing last year.

Anderson voiced other characters over the years, but none that came close to the profile of the red-haired, green-suited leprechaun. He told ABC News in 2005, “It was a fun character to play. Hardly a day goes by when somebody doesn’t ask me to the sing the Lucky Charms jingle, and I’m proud of that.”

Arthur John Miles Anderson passed this week at the age of 93. He was lucky indeed.

(And since Lucky and I were born in the same year, I consider myself lucky too. Godspeed, Lucky, and thanks for the yummy moments. They were magically delicious.)